<ul class="layui-nav layui-nav-tree"  lay-filter="test">
    <li class="layui-nav-item layui-nav-itemed">
        <a class="" href="javascript:;">待开发</a>
        <dl class="layui-nav-child">
            <dd><a href="javascript:refreshPart()">待开发</a></dd>
            <dd><a href="javascript:;">待开发</a></dd>
            <dd><a href="javascript:;">待开发</a></dd>
            <dd><a href="">待开发</a></dd>
        </dl>
    </li>
</ul>